I FOUND A ROLEX WATcH?

I was walking on my way home today when i saw something shiny on the ground and when i pick it up it's a watch ... a ROLEX watch . I cant really believe that i would be so lucky to find something like this kind of watch and it really look real and it's heavy . i took it to a certified ROLEX watch store and ask them to check it out for me if it is real , they open it up and they told me it's a genuine antique ROLEX that was actually made in the 40's , they said that this watch is quite rare nowadays and its a collectors choice and they even ask me if i want to sell it to them . i cant still believe that i would stumble in this kinda luck , its like winning a lotto .. Here is the problem now , I am a very superstitious guy , perhaps i inherited it from my folks , In the world i grew up i were told that picking and keeping something in the street that doesnt belong to me is a bad luck , the person that owned it might be grieving or perhaps he is in a very bad luck situation too and those